I have a generic cheap set of plastic RPG dice which I hope to use as a reference for my larger laser cut versions. The plan is to quantify some form of relative scaling/size.
 

Dice measurements in mm to one decimal place

Dice | Edge length | Height | Height % (Based on D20)
-----|-------------|--------|---------
D4   |     20.2    |  17    | 85
D6   |     16.2    |  16.2  | 81
D8   |     18.8    |  15.9  | 79.5
D10  |  15.9  7.2  |  15.9  | 79.5
D12  |     8.2     |  17.9  | 89.5
D20  |     12      |  20    | 100

 
The D20 is 20mm tall <3